s390-tools/xpram

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#! /bin/sh
# Copyright (c) 2004 SUSE LINUX AG Nuernberg, Germany.
#
# Submit feedback to http://www.suse.de/feedback/
#
# System startup script for XPRAM device driver
XPRAM_CONFIG_FILE=/etc/sysconfig/xpram
read_config_file() {
if [ config_read = 1 ]; then
return 0
fi
file=$XPRAM_CONFIG_FILE
if [ -s "$file" ]; then
source $file
config_read=1
else
echo -ne "Cannot read $file: empty or nonexistant! "
# Means not configured:
return 6
fi
}
prepare_xpram() {
if [ -z "$XPRAM_MNTPATH" -o -z "$XPRAM_DEVNODE" ]; then
echo -n "Cannot mkfs/mount XPRAM: Missing parameters! "
exit 6
fi
grep -q $XPRAM_DEVNODE /proc/mounts 2>&1 > /dev/null
if [ $? -eq 0 ] ; then
echo -n "$service: $XPRAM_DEVNODE already mounted! "
return
fi
current_fstype=`vol_id -t $XPRAM_DEVNODE 2> /dev/null`
if [ $? -ne 0 -o "$XPRAM_FORCE" = "yes" ]
then
# Does not contain a valid filesystem/swap space
if [ "$XPRAM_FSTYPE" = swap ]
then
mkswap $XPRAM_DEVNODE
else
mkfs -t "$XPRAM_FSTYPE" -b 4096 "$XPRAM_DEVNODE"
fi
sleep 1 # workaround
current_fstype=$XPRAM_FSTYPE
fi
if [ ! "$current_fstype" = "$XPRAM_FSTYPE" ]
then
echo
echo -n "Warning: current filessystem and configured filesystem are not the same!"
exit 6
fi
if [ "$XPRAM_FSTYPE" = swap ]
then
if [ "$XPRAM_SWAP_PRI" = "" ]
then
swapon $XPRAM_DEVNODE
else
swapon -p $XPRAM_SWAP_PRI $XPRAM_DEVNODE
fi
else
if [ ! -d "$XPRAM_MNTPATH" ]
then
mkdir -p "$XPRAM_MNTPATH"
fi
mount "$XPRAM_DEVNODE" "$XPRAM_MNTPATH"
if [ $? -ne 0 ]
then
echo -n "Mount failed with error code $?"
exit 6
fi
fi
}
# Return values acc. to LSB for all commands but status:
# 0 - success
# 1 - generic or unspecified error
# 2 - invalid or excess argument(s)
# 3 - unimplemented feature (e.g. "reload")
# 4 - insufficient privilege
# 5 - program is not installed
# 6 - program is not configured
# 7 - program is not running
#
# Note that starting an already running service, stopping
# or restarting a not-running service as well as the restart
# with force-reload (in case signalling is not supported) are
# considered a success.
check_config () {
if [ -z "$XPRAM_MODULE" ]; then
echo -n "$file: parameters XPRAM_MODULE missing! "
exit 6
fi
}
quit_disabled() {
if [ "$XPRAM_START" != "yes" ]; then
# Config file exists but xpram not enabled, do not complain,
# but note with exit status 6 that we are not configured.
echo "xpram not enabled"
exit 0
fi
}
service="xpram"
case "$1" in
start)
# Read in configuration
read_config_file || exit 6
quit_disabled
check_config
echo -n "Creating $service device "
modprobe "$XPRAM_MODULE"
if [ $? -ne 0 ]; then
echo -n "- failed to load $XPRAM_MODULE "
exit 1
else
prepare_xpram
fi
;;
stop)
# Read in configuration
read_config_file || exit 6
# check_enabled
# quit_disabled
echo -n "Removing $service device "
check_config
if [ "$XPRAM_DEVNODE" ]; then
if grep -q $XPRAM_DEVNODE /proc/mounts; then
umount $XPRAM_DEVNODE
fi
if swapon -s | grep -q $XPRAM_DEVNODE; then
swapoff $XPRAM_DEVNODE
fi
fi
if grep -q "$XPRAM_MODULE" /proc/modules; then
rmmod "$XPRAM_MODULE"
else
exit 7
fi
;;
status)
echo -n "Checking $service "
# Status has a slightly different meaning for the status command:
# 0 - service running
# 1 - service dead, but /var/run/ pid file exists
# 3 - service not running
# Read in configuration
read_config_file || exit 3
check_config
lsmod | grep -q $XPRAM_MODULE
if [ $? -eq 0 ]; then
if [ "$XPRAM_DEVNODE" ]; then
if ! grep -q $XPRAM_DEVNODE /proc/mounts && ! swapon -s | grep -q $XPRAM_DEVNODE; then
xpram_result=3
echo -n "loaded, but $XPRAM_DEVNODE not used"
exit 3
fi
fi
else
exit 3
fi
;;
esac